Externalize deoptimization reasons.

src/ia32/assembler-ia32.h

Index: src/ia32/assembler-ia32.h
diff --git a/src/ia32/assembler-ia32.h b/src/ia32/assembler-ia32.h
index b913f7afc8e2af773ea019e5ab81ac22b0ca4e14..e29d6e30ec3277d9cf63fce3dd0928f4691a4757 100644
--- a/src/ia32/assembler-ia32.h
+++ b/src/ia32/assembler-ia32.h
@@ -1260,6 +1260,11 @@ class Assembler : public AssemblerBase {
   // write a comment.
   void RecordComment(const char* msg, bool force = false);
 
+  // Record a deoptimization reason that can be used by a log or cpu profiler.
+  // Use --trace-deopt to enable, or provide "force = true" flag to always

[Michael Starzinger, 2015/02/04 11:30:51]

nit: There doesn't seem to be a "force" flag, let's drop that part of the
comment.

[loislo, 2015/02/04 14:38:50]

done

+  // write it.
+  void RecordDeoptReason(const int reason, const int raw_position);
+
   // Writes a single byte or word of data in the code stream.  Used for
   // inline tables, e.g., jump-tables.
   void db(uint8_t data);